A man is in a critical condition after a semi-trailer rolled on the Leichhardt Highway at Kowguran, about 15 kilometres north of Miles last night.
Initial information indicates the semi-trailer transporting rail carriage parts overturned before two vehicles travelling in opposite directions crashed into the trailer around 9.15pm.
The driver of the truck, a man aged in his 50s, suffered life-threatening injuries and was airlifted to a Brisbane hospital in a critical condition.
A male passenger from the second vehicle and the male driver of the third vehicle were airlifted to Toowoomba Hospital with non-life-threating injuries.
The Leichhardt Highway remains closed with local diversions in place.
The Forensic Crash Unit is investigating the incident.
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